634738489 has 32 divisors (see below), whose sum is σ = 808733952. Its totient is φ = 483840000.

The previous prime is 634738487. The next prime is 634738493. The reversal of 634738489 is 984837436.

It is not a de Polignac number, because 634738489 - 2¹ = 634738487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634738483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1582689 + ... + 1583089.

It is an arithmetic number, because the mean of its divisors is an integer number (25272936).

Almost surely, 2^634738489 is an apocalyptic number.

It is an amenable number.

634738489 is a deficient number, since it is larger than the sum of its proper divisors (173995463).

634738489 is a wasteful number, since it uses less digits than its factorization.

634738489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817.

The product of its digits is 3483648, while the sum is 52.

The square root of 634738489 is about 25194.0169286281. The cubic root of 634738489 is about 859.4057951437.

The spelling of 634738489 in words is "six hundred thirty-four million, seven hundred thirty-eight thousand, four hundred eighty-nine".